package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    @Override
    public void addCategory(CategoryDTO categoryDTO) {
        Category category = new Category();

        // 对象属性拷贝
        BeanUtils.copyProperties(categoryDTO, category);

        // 设置其他属性
        category.setStatus(StatusConstant.DISABLE);
        /*category.setCreateTime(LocalDateTime.now());
        category.setCreateUser(BaseContext.getCurrentId());
        category.setUpdateTime(LocalDateTime.now());
        category.setUpdateUser(BaseContext.getCurrentId());*/

        categoryMapper.addCategory(category);
    }

    @Override
    public PageResult getCategoryList(CategoryPageQueryDTO categoryPageQueryDTO) {
        // 调用pageHelper
        PageHelper.startPage(categoryPageQueryDTO.getPage(), categoryPageQueryDTO.getPageSize());
        Page<Category> page = categoryMapper.getCategoryList(categoryPageQueryDTO);

        return new PageResult(page.getTotal(), page.getResult());
    }

    @Override
    public List<Category> searchCategory(Integer type) {
        return categoryMapper.searchCategory(type);
    }

    @Override
    public void setCategoryStatus(Long id, Integer status) {
        Category category = Category.builder()
                .id(id)
                .status(status)
                .build();

        categoryMapper.updateCategory(category);
    }

    @Override
    public void updateCategory(CategoryDTO categoryDTO) {
        Category category = new Category();

        // 对象属性拷贝
        BeanUtils.copyProperties(categoryDTO, category);

        // 设置其他属性
        /**
         * 这里用面向切面编程实现公共字段赋值

         * category.setUpdateTime(LocalDateTime.now());
         * category.setUpdateUser(BaseContext.getCurrentId());
         */


        categoryMapper.updateCategory(category);
    }

    @Override
    public void deleteCategoryById(Long id) {
        //查询当前分类是否关联了菜品，如果关联了就抛出业务异常
        Integer count = dishMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }

        //查询当前分类是否关联了套餐，如果关联了就抛出业务异常
        count = setmealMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }

        //删除分类数据
        categoryMapper.deleteCategoryById(id);
    }
}
